code: def julianDate(self, frame):
      t = self
      if frame != self._frame:
          t = self.convert(frame)
  
      return t._jd + t._seconds / 86400.0
  
file_path: catboost/contrib/python/matplotlib/py3/matplotlib/testing/jpl_units/Epoch.py
imports: import functools
  import operator
  import math
  import datetime
  from matplotlib import _api
  from matplotlib.dates import date2num
label_desc: Use image node_id 4 for calling the Epoch obj's underlying member method code with example usage: obj.julianDate(frame) and returns: unknown